Abstract: A rollable or plastically deformable Sendust-type magnetic alloy containing by weight 3 to 8% aluminum, 4 to 8% silicon, 0.1 to 1% niobium or tantalum or mixtures thereof and the balance iron. The alloy is especially suitable for use with high-frequency inputs.

Abstract: A method of electrochemically polishing a metal body which comprises juxtaposing the surface to be polished with a tool electrode in the presence of an abrasive and an electrolyte, and applying pulses having a duration not exceeding 100 microseconds between the electrode and the workpiece with the electrode being poled negatively.

Abstract: A method of preparing a heat-transfer member having a porous metallic heat-transfer interface comprising the steps of:(a) disposing at least one surface of a substrate in contact with a solution containing a salt of a thermally conductive metal, and(b) depositing said metal from said solution upon said substrate so as to form a dendritic metallic layer thereon constituting said porous heat-transfer interface.

Abstract: An electrochemical grinding process is controlled by the use of a feed-rate indicating device which calculates and displaces the feed-rate (V) of a workpiece and a grinding wheel which are displaced relatively toward one another. The feed rate V is determined by the relationshipV = A p/h + B/.sqroot.hwhere h is the cutting depth, p is the force for driving the wheel electrode in terms of nominal kilowatt power rating P per unit width w of the cutting area, and A and B are constants. These constants are determined between values of A of 150 to 156, exclusive, and values of B from 5.8 to 11.4, exclusive for current densities of 60 to 80 amperes cm.sup.2, respectively, by extrapolation.

Abstract: Activation of metallic powders by subjecting the powder to bombardment with electrons, ions, or molecules in an inert or reductive atmosphere. Improved densities result in sintering, as do improved catalytic actions. Simultaneous pulverization of coarse particles or bodies is also achieved where desired. The pretreatment is, in some instances, combined with loading the activated particles directly into a mold, for compaction or sintering, preferably with some additional activation, all done in an integrated system. The corpuscular particle bombardment of powder is advantageously effected by exposing the powder to a glow discharge produced between a pair of electrodes in a rarefied non-oxidizing atmosphere with the pressure of the atmosphere and the distance between the electrodes being such that their product in mm Hg times cm is in a range between 10.sup.-2 and 10.